#include<bits/stdc++.h>
using namespace std;
int main(){
	string s1= "5 6 -1 5 4 -7";
	cout<<s1[s1.size()-2];
	cout<<s1[s1.size()-1];
	string s2= "13";
	cout<<s2[s2.size()-1];
	cout<<"==============================";
	int add = s1[s1.size()-1]+s2[s2.size()-1] -'0'-'0';
	cout<<add;
	return 0;
}
